Fault code lookup

NetworkU02A3

Serious

Severity: Serious - have it checked soon

Lost Communication With Particulate Matter Sensor

19 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list

1What it means in plain English

Control modules in the car cannot communicate with each other over the vehicle network.

2Common causes

  1. Wiring or connector fault on the communication bus
  2. Faulty control module
  3. Low battery voltage or poor ground
  4. Water ingress in a connector or module
  5. Aftermarket device interfering with the bus

3Can I drive?

Serious · drive with care

The car may run normally or may not run at all. If the module that has lost communication controls steering, brakes, park brake, charging or engine cooling, drive only if those systems feel normal; stop safely if the steering becomes heavy, a brake warning appears, or the engine temperature climbs. If the car will not start or runs badly, have it towed.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 19

BrandCodeDescriptionSystem
Ashok Leyland CVU02A3Lost Communication With Particulate Matter Sensor SAENetwork
BYDU02A3Communication with battery manager fault BrandNetwork
DaewooU02A3Lost Communication With Particulate Matter Sensor SAENetwork
EOBDU02A3Kaotatud side osakestetunduriga BrandNetwork
GMU02A3Lost Communication With Particulate Matter Sensor SAENetwork
HoldenU02A3Lost Communication With Particulate Matter Sensor BrandNetwork
HondaU02A3Lost Communication With Particulate Matter Sensor SAENetwork
HyundaiU02A3Lost Communication With Particulate Matter Sensor SAENetwork
IsuzuU02A3Lost Communication With Particulate Matter Sensor SAENetwork
Land RoverU02A3Lost communication with particulate matter sensor BrandNetwork
MaseratiU02A3Lost Communication With Left Center Console Intrusion Sensor BrandNetwork
MitsubishiU02A3Lost Communication With Particulate Matter Sensor SAENetwork
OpelU02A3Lost Communication With Particulate Matter Sensor SAENetwork
PeugeotU02A3Lost Communication With Particulate Matter Sensor SAENetwork
ProtonU02A3Lost Communication With Particulate Matter Sensor SAENetwork
SaabU02A3Lost Communication With Particulate Matter Sensor SAENetwork
SuzukiU02A3PM Sensor Node Absent BrandNetwork
TataU02A3Lost Communication With Particulate Matter Sensor SAENetwork
ToyotaU02A3Lost communication with particulate matter sensor BrandNetwork

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of U02A3 and may be reported by some scan tools.

BrandCodeDescriptionSystem
HyundaiU02A300If CCP-CAN message from PM sensor is not received, ECM sets DTC BrandNetwork
SsangYongU02A300CAN: Faulty PM sensor communication BrandNetwork

6Related codes

  • U02A0 Invalid data received from Hybrid/EV battery interface control module 'D'
  • U02A1 Lost Communication With NOx Sensor C
  • U02A2 Lost Communication With Reductant Quality Module
  • U02A4 Lost communication with NH3 sensor
  • U02A5 Lost communication with reductant heater control module
  • U02A6 Lost communication with safety integrated control module
  • U02A7 Lost communication with engine sound control 1
  • U02A8 Lost communication with engine sound control 2
  • U02A9 Lost Communication With Charge Air Cooler Coolant Pump A
  • U02AA Lost communication with engine disconnect clutch
  • U02AB Lost communication with vehicle power control module
  • U02AC Lost communication with turbocharger/supercharger boost control 'A'

Browse Uxxx codes or U02Axx codes.

OpenDTC - independent fault code reference